FR3070030B1 - SYSTEM FOR CLEANING A GLASS VEHICLE SURFACE - Google Patents

Abstract

A cleaning system of at least one glazed surface (21) comprises at least two devices (100 to 111) for blasting a cleaning product on an associated glass surface. The projection devices each comprise an electronic control module (120) configured to control the operation of the corresponding projection device according to control instructions, and the cleaning system comprises an in-line carrier current bus common to the at least two projection devices (100 to 111), which are electrically connected to the line carrier bus (11) independently of each other and in successive areas (90, 92) of said in-line carrier bus.

Description

The invention relates to the field of cleaning systems fitted to motor vehicles. It relates more particularly to the field of cleaning systems of a glazed surface of such vehicles.

The document US2012 / 266926 describes an architecture of a cleaning system comprising a plurality of devices for projecting a cleaning product. These projection devices are arranged on the front face and / or front facet and / or on a rearview mirror of the vehicle to allow the cleaning of an associated glazed surface.

In such cleaning systems, first projection devices may be actuated by a manual control initiated by a user of the vehicle and second projection devices may be actuated by an automatic control initiated by a driver assistance device and / or maneuver. of this vehicle. The glazed surfaces associated with the first projection devices correspond, for example, to the windshield and the rear window of the vehicle, whereas the glazed surfaces associated with the second projection devices correspond, for example, to the optical sensor surfaces intended to assist the driving and / or maneuvering the vehicle.

To supply the cleaning device with these projection devices, the architecture of the cleaning system of the cited document comprises a reservoir and a pump connected to each of these projection devices via a main solenoid valve deriving the cleaning product supplied by the pump to respective conduits associated with each Thus, in this architecture, the projection devices are fed by the cleaning system pump separately from each other, the control of the solenoid valve directing the cleaning product pumped from the tank to one or the other. other pipes

When a vehicle cleaning system comprises a large number of projection devices powered by the same pump, the number of pipes to provide for hydraulically connecting all projection devices estimportant and can be problematic, in terms of mounting complexity and cost . Each of the hydraulic lines represents for example a cost meter greatly weighting the overall cost of the cleaning system.

Furthermore, each of the projection devices must be electrically connected to a main electronic unit for controlling the cleaning function, and for example the triggering of the cleaning function and / or the implementation of a deployment of the projector to achieve this. In addition, in order to electrically connect each of the projection devices to the main electronic unit, it is necessary to provide a cleaning system comprising a large number of cables and electrical connectors. An arrangement in which a cable is drawn between the main electronic unit and each of the projection devices again represents a cost meter determining the overall cost of the cleaning system.

In a context of vehicle development, and for example autonomous vehicles, where the number of sensors is brought to be more and more important around the perimeter of the vehicle, it is understood that these disadvantages must be considered.

The object of the present invention is to overcome at least one of the disadvantages mentioned above and to propose a cleaning system equipping a vehicle and making it possible to reduce its manufacturing cost while simplifying its mounting in the vehicle. To this end, the subject of the invention is a system for cleaning at least one vehicle glazed surface, comprising at least two devices for projecting a cleaning product onto an associated glazed surface. According to the invention, the projection devices each comprise an electronic control module configured to control the operation of the corresponding projection device according to control instructions, and the cleaning system comprises an in-line carrier power bus common to the at least two devices. projecting, which are electrically connected to the power line bus independently of one another and in successive zones of said in-line carrier decurrent bus.

The following will be understood by: - "power line bus", an electric control bus connected to a vehicle power source and using PLC-technology (or PLC for Power-line communication), which consists in configuring the frequency of the current passing through the electric control bus for transmitting or exchanging data, - "cleaning product", a liquid or gaseous product that can be projected onto a glass surface for the purpose of cleaning it, such a product may be indifferently in the present invention of water, windshield washer fluid, or air, "glass surface", a transparent surface which may be on the one hand a window of the passenger compartment of the vehicle and in particular a windshield or a rear window or on the other hand an optical surface of an optical detection system equipping the vehicle; In particular, it can be provided that the glass surface is made of glass or of a transparent Plexiglas type plastic.

Thanks to the cleaning system according to the invention, it is possible to reduce significantly the overall cost of implantation in the vehicle of such a cleaning system. In fact, unlike the architecture of known cleaning systems, only one power and control circuit is used to power and control each of the projection devices equipping the vehicle, said supply and control circuit forming part of the so an electrical control bus on which the projection devices come to recover the current and the information necessary for the operation of the cleaning. The electric control bus is advantageously a power line bus in line corresponding to a power source for controlling. These projection devices are each electrically connected to the same in-line carrier bus along it so that each of these projection devices can be powered and controlled by the power line bus independently of one another . It will be understood that the cleaning system according to the invention is all the more interesting since it comprises a large number of projection devices, connected respectively to the same electric control bus, at a distance from each other along this bus traveling the length of the vehicle.

In this way, it is notable according to the invention that the electrical circuits of a cleaning system fitted to a vehicle are greatly simplified. Indeed, according to the invention, the in-line power bus bus acts as a bus power supply and control, traveling through the vehicle to power each of these projection devices equipping the vehicle. Ladimension and the size of the son needed to specifically link the electric control bus to each projection device are weak and the constraints of fixing the electrical circuit in the vehicle thus overheadout the on-line carrier bus, shared for each device projection.

Moreover, the electric cables are regularly fixed to structural elements of the vehicle by fasteners, either along or through walls delimiting the passenger compartment for example, and it is understood that the reduction in the total length of the electric cables makes it possible to reduce the number of these attachments, and therefore the cost of parts to provide for the installation of the cleaning system in the vehicle and the time required for mounting these system.

According to a characteristic of the invention, at least one of the projection devices is electrically connected to the in-line carrier bus via an electrical connection member arranged on said bus. It is understood that the connecting members, respectively present in one of the successive zones of the in-line carrier bus, are arranged at a distance from one another.

According to another characteristic of the invention, each of the projection devices comprises an electrical connection terminal configured to be connected on the one hand to one of the electrical connection members arranged on the in-line carrier bus and on the other hand to the electronic module control.

The electrical connection terminal may have two power supply pins. These two power pins are configured to pass the current and associated control instructions from the in-line carrier bus to the projection device and its control electronics module. Preferably, the projection device and its control electronics are powered by a voltage of 12V.

The in-line carrier current bus comprises a positive pole corresponding to a positive voltage, preferably equal to 12 V and a zero pole corresponding to a mass, each pole being connected to one of the pins of the electrical connection terminal of a projection device. According to one characteristic of the invention, the cleaning system comprises pairs of electrical wires in which each wire connects respectively a pin of one of the connection terminals and one of the electrical connection members.

According to one characteristic of the invention, the electronic control module is configured to analyze all of the control instructions passing through the in-line carrier bus and to recover in this set the control instruction or instructions corresponding to its projection device.

According to one characteristic of the invention, each of the projection devices comprises a solenoid valve and a nozzle, said solenoid valve being controlled by the electronic control module.

When an automatic cleaning control command is received by the electronic control module via the in-line power bus, the electronic control module transmits and / or generates the command command of the solenoid valve to allow the passage of the cleaning product from the hydraulic distribution bus to the nozzle, and if necessary to authorize the displacement of the nozzle, to project the cleaning product on the glass surface associated therewith.

The nozzle may be of fixed or telescopic type. In other words, the projection device is configured so that the jet nozzle (s) of the cleaning product keep a fixed position during and between the cleaning operations, or that these projection nozzles are mounted on a telescopic body capable of assuming a position of cleaning in front of the glass surface to be cleaned and a retracted position.

According to a characteristic of the invention, at least one of the projection devices is associated with an optical detection system and the projection device and the associated optical detection system are housed in a common housing.

Such an optical detection system may be an optical sensor of the video camera type or laser scanner, necessary to allow the operation of a device for assisting the driving and / or maneuvering of the vehicle. The glass surface of these sensors is then an optical surface formed by a protective glass exposed to the weather.

The in-line power bus and the hydraulic distribution bus can be flexible. In other words, these buses can be made in a resilient material.

According to a characteristic of the invention, the cleaning system comprises a hydraulic distribution bus able to allow the circulation of the cleaning product, the at least two projection devices being hydraulically connected to the hydraulic distribution bus independently of one another. The term "hydraulic distribution bus" includes a conduit for conveying the cleaning product. Therefore, it is possible to further reduce the overall cost of the installation in the vehicle of such a cleaning system. In fact, unlike the architecture of known cleaning systems, only a hydraulic distribution bus is used to supply hydraulically a plurality of projection devices equipping the vehicle. These projection devices are each hydraulically connected to the same hydraulic distribution bus along it so that each of these projection devices can be served cleaning product by the hydraulic distribution bus independently of one another.

Moreover, it is possible to simplify the hydraulic circuits of a cleaning system equipping a vehicle. The hydraulic distribution bus can run a vehicle to supply hydraulically each of these projection devices equipping the vehicle. This advantageously makes it possible to optimize the space in a vehicle dedicated to hydraulic circuits for such cleaning systems. In practice, the hydraulic distribution bus is regularly fixed to the vehicle by fasteners. These fasteners may be common to the decurrent carrier bus in line.

In this context, it is possible to simplify the implementation of the electrical circuits of a cleaning system equipping a vehicle. For this purpose, the decurant bus carrying the line can follow the path of the hydraulic distribution bus running the vehicle to electrically power and control each of the projection devices fitted to the vehicle. This advantageously makes it possible to optimize the space in a vehicle dedicated to electrical circuits for such cleaning systems.

According to a particular characteristic of the invention, the cleaning system comprises a single in-line carrier bus and a single hydraulic distribution bus. The various circuits of a cleaning system equipping a vehicle are then further simplified.

According to one embodiment of the invention, the hydraulic distribution bus forms an open hydraulic circuit. In other words, the cleaning product circulating in the hydraulic distribution bus is at a substantially different pressure between a first end of the hydraulic distribution bus connected to an outlet of the pump and a second end of the hydraulic distribution bus closed and opposite the first end. when all the projection devices connected to this hydraulic distribution bus are actuated.

It can be envisaged that the hydraulic distribution bus forms a closed hydraulic circuit. In other words, the cleaning product circulates in a closed loop and thus has an almost constant pressure input and output of the hydraulic distribution bus, this when all the projection devices connected to the hydraulic distribution bus are actuated.

According to a characteristic of the invention, the cleaning system comprisesa pump capable of supplying the hydraulic distribution bus with cleaning product. In particular, the pump can supply the hydraulic distribution bus by drawing cleaning product into a storage tank of this product. When the hydraulic distribution bus forms a closed hydraulic circuit, a first end of the hydraulic distribution bus is connected to a pump outlet. and a second end of the hydraulic distribution bus opposite the first end is connected to an inlet of the pump.

According to a characteristic of the invention, the hydraulic distribution bus comprises at least two portions arranged on either side of a wall andrelated to one another by a hydraulic connector. This embodiment makes it possible to hydraulically connect two portions of the hydraulic distribution bus extending along the vehicle and forming, according to the invention, the main distribution duct, these two portions being separated by a wall of the vehicle. The hydraulic connector can be mounted in an opening formed in this wall. Such a wall may be metallic or plastic and corresponds to a wall on the distribution path of the hydraulic distribution bus traversing the vehicle to serve the projection devices.

One end of each portion of the hydraulic distribution bus to be connected to each other may carry a hydraulic connection port for connection to the hydraulic connector.

In this context of hydraulic distribution bus, the at least two projection devices can in particular be connected to the same portion of the hydraulic distribution bus, or be respectively connected to different portions of the hydraulic distribution bus. In particular, it can be provided that the dispensing devices are arranged so that each portion of the hydraulic distribution bus serves at least two dispensing devices.

According to features of the invention, at least one of the projection devices comprises hydraulic connection members on the hydraulic distribution bus. In other words, each of the projection devices is connected to the hydraulic distribution bus by a hydraulic connection member. And, additionally, at least one of the projection devices comprises mechanical holding members on the hydraulic distribution bus.

These hydraulic connection members may be formed by desirets provided for piercing the hydraulic distribution bus.

According to a characteristic of the invention, the hydraulic connection member and the mechanical holding member of each of the projection devices can be carried by the solenoid valve. Such a solenoid valve can be advantageously mechanically and hydraulically connected to the hydraulic distribution bus in the same assembly operation.

In particular, the hydraulic connecting member and the futurtientien member of each of the projection devices can be carried by the housing. The housing previously equipped with the projection device and the optical detection system can then be mechanically and hydraulically connected to the hydraulic distribution bus. The housing then forms a mechanical and hydraulic connection interface between the hydraulic distribution bus and the corresponding projection device.

According to one characteristic of the invention, the in-line power bus and the hydraulic distribution bus form a single electrical and hydraulic distribution bus for the projection devices. On this electric and hydraulic distribution bus are connected separately from each other the projection devices. In other words, the electric control bus is formed in conjunction with the hydraulic distribution bus.

With this particular embodiment, it is possible to simplifyassembly of the cleaning system in the vehicle. Thus, the projection devices can be hydraulically and electrically connected from a common part of the distribution bus.

In particular, the electrical and hydraulic distribution bus may be flexible. In other words, the electrical and hydraulic distribution bus may be made of an elastic material.

According to a characteristic of the invention, the electric and hydraulic distribution bus comprises an extruded tube having in the center of the tube a central channel within which the cleansing product andpresenting on the periphery of the tube of the pipes inside which it is possible to circulate each of the supply strands of the powerline bus in line.

According to another characteristic of the invention, the electrical and hydraulic distribution bus comprises a tube within which the cleaning product can be circulated and inside which also the in-line decurrent carrier bus extends. The in-line power bus can act as a resistive wire to raise the temperature of the cleaning product to be sprayed, especially in very cold conditions. For example, the in-line carrier bus can pass through the hydraulic distribution bus at its center. It will then be understood that the hydraulic distribution bus is annular to receive at its center the power line bus in line. In other words, the hydraulic distribution bus and the in-line power bus are coaxial with each other.

The in-line power bus may be overmoulded on the conduit delimiting the hydraulic distribution bus.

According to a characteristic of the invention, the electrical and hydraulic distribution bus comprises at least two portions connected to each other by a hydraulic and electrical connector. This particular embodiment allows derelier electrically and hydraulically two portions of the distribution busparparés by a wall of the vehicle, for example a wall delimiting the passenger compartment and the engine compartment. The electrical and hydraulic connector can be mounted in an opening formed in this wall.

Advantageously, an end of each portion of the electrical and hydraulic distribution bus intended to be connected to one another carries an electrical and hydraulic disconnection port for its connection to the electrical and hydraulic connector.

According to other features of the invention, it can be provided that at least a first projection device is for cleaning an optical surface of a sensor for automatic analysis of the road scene, i.e. an analysisby the vehicle electronics, in particular for controlling a device for assisting with driving and / or maneuvering the vehicle, andthat at least one second projection device is intended for cleaning a glass surface of the passenger compartment or an optical surface of a sensor only for the purpose of the driver's analysis of the vehicle. In this case, it is advantageous that the hydraulic distribution bus is arranged so that the at least one second projection device is disposed on the hydraulic distribution bus, common to each of the projection devices, to be further away from an output of pump supplying this hydraulic distribution bus than is the at least one projection device.

Indeed, especially when the hydraulic distribution bus common to all the projection devices is an open circuit, it is understood that the cleaning product circulating at the end of this open circuit furthest from the pump may have a lower pressure than the one of the cleaning product circulating at the pump outlet. However, it is important that the optical detection systems associated with driving assistance systems are immaculate in order to avoid a bad analysis of the road scene detected by the onboard electronics of the vehicle whereas if the driver analyzes by himself the detected image of the road lascene, it is better able to analyze the partially tainted image without any fault of judgment. Therefore, it can advantageously place thesecond projection device on a portion of the hydraulic distribution bus where the pressure is less, the potential risk of optimal cleaning is less impacting. Moreover, by prioritizing the hydraulic supply cleaning product for first and second projection devices, that is to say by placing them so that they are more or less reached by the cleaning product at the pump outlet, it is possible to avoid that a non-essential cleaning action penalizes the triggering or the effectiveness of an action essential for the automatic processing of information coming from optical detection systems. Other features, details and advantages of the invention will emerge more clearly on reading the description given below for information in connection with drawings in which: - Figure 1 illustrates a schematic view of a motor vehicle equipped with a cleaning system according to the invention comprising an in-line feeder bus and a hydraulic distribution bus contiguously coupled to each other andby the vehicle for respectively feeding food and control instructions, and a cleaning product, to projection devices of the cleaning system mounted on the same vehicle, - Figure 2 illustrates a schematic view of a vehicle wall housing a hydraulic connector for connecting two portions of the powerline bus and two portions of the hydraulic distribution bus, - the FIG. 3 is a schematic view of an embodiment of the invention in which one of the The hydraulic fluid distribution bus and the in-line power bus are separated, on the one hand, hydraulically from the hydraulic distribution bus and, on the other hand, electrically from an in-line power bus. 4 illustrates a schematic view of another embodiment of the invention in which the hydraulic distribution bus and the in-line feeder bus form a single electrical and hydraulic distribution bus, FIG. 5 illustrates a schematic view of a section of the electrical and hydraulic distribution bus illustrated in FIG. 4, cut at the level of an electrical connection member. In Figure 1, there is shown a vehicle 1 automobile equipped with a cleaning system 2 according to the invention, which allows the cleaning of at least one truncated surface 20, 21 of the vehicle 1. Such a glazed surface may be for example a windshield 20 or a rear window of the vehicle, or it can be an optical surface 21 of an optical detection system 4 fitted to the vehicle 1.

The cleaning system 2 comprises projection devices 100 to 111of the cleaning product disposed in the vehicle 1 to be associated respectively with the cleaning of a glazed surface 20, 21, and at least one in-line decurrent carrier bus 11 capable of enabling feeding in the example illustrated, a projection device is specifically dedicated to the cleaning of a single glazed surface, but it will be understood that several projection devices could be dedicated to the cleaning of the same vitreous surface, for example the windshield 20, without departing from the context of the invention as soon as an in-line carrier bus 11 is arranged through the vehicle and a plurality of these projection devices are connected to this bus of food and communication.

More particularly, according to the invention, each of the projection devices 100 to 111 is connected by electrical connection members 14 to the line-borne decurrent bus 11, and these projection devices are connected to the common bus independently of one another. other, and in different and successive areas 90, 92 (visible in Figure 3) of the common bus. In this nonlimiting embodiment, it will be understood that a single in-line carrier bus provides power and control of all the projection devices 100 to 111 mounted on the vehicle 1.

The means used for the electrical connection of the projection devices to a common power and communication bus will be described in more detail below.

With reference to FIG. 1, it should also be noted that the projection devices can be connected hydraulically, independently of each other by means of hydraulic connection members, to a common hydraulic distribution bus 3.

The cleaning system 2 further comprises a pump 5 and a cleaning product storage tank. The pump 5 is configured to retrieve the cleaning product from the storage tank and to supply the main hydraulic water continuously with a cleaning product. More particularly, an outlet 50 of the pump 5 is connected to a first end 30 of the hydraulic distribution bus 3. As a result, the hydraulic distribution bus 3 extends along the vehicle from this first end 30 to a second end 31 In the illustrated example, the second end 31 of the hydraulic distribution bus 3, opposite the first end 30, is closed so that the hydraulic distribution bus 3 forms an open hydraulic circuit. Of course, the hydraulic distribution bus could be configured to form a closed hydraulic circuit and the second end 31 of the hydraulic distribution bus could in this context be linked to the storage tank.

Referring to FIG. 1, first projection devices 100 to 108 are intended to clean an optical surface of a sensor for automatic analysis of the road scene, i.e., an electron analysis of the vehicle in particular for controlling a device for assisting the driving and / or maneuver of this vehicle, and the second projection devices 109 to 111 are intended to clean a glass surface of the passenger compartment or an optical surface of a sensor serving only in the direct analysis by the driver of the vehicle.The hydraulic distribution bus 3 is configured in this case to be one of the second projection devices, here a device associated with the cleaning of the rear window, which is disposed end the hydraulic distribution bus, at the level of its second end 31, that is to say in the area of the distribution bus farthest from the outlet 50 of the pump 5.

According to the invention, the line carrier bus 11 is arranged in the vehicle for distributing current and control instructions to each projection device, and for reasons of simplification of mounting and cost reduction, the power bus line 11 advantageously along the hydraulic distribution bus, such as that seranotamment described in more detail with reference to Figures 4 and 5.

The hydraulic distribution bus 3 and the in-line carrier bus 11present here respectively a first portion 32 arranged in the front part of the vehicle, and a second portion 33 arranged in the passenger compartment, eachportion snaking in the part of the corresponding vehicle to distribute the set of projection devices present in this part of the vehicle. It is understood that a hydraulic continuity is here realized between these two portions32, 33 since a single pump 5 is provided on the distribution bus. In Figure 2, there is shown a way to ensure continuity between cesportions 32, 33 when buses 3, 11 are passed through one or moreparois (s) 80 of the vehicle 1, this advantageously to optimize the route of the bus in the vehicle 1 and thus reduce the length necessary for the realization of these buses common to each projection device. In this case, the portions32, 33 are connected in pairs to one another via a hydraulic and electrical connector 19. More particularly, a first portion 32 and a secondportion 33 of the buses 3, 11 each carry at their opposite end a Hydraulic and electrical connection port for their connection to the connector 16. It can be provided that two projection devices 100 to 111 are connected to a same portion 32, 33 of the hydraulic distribution bus 3 and electric control 11 or each to a different portion 32, 33 buses 3,11.

Referring to FIG. 3, the projection devices 100 to 111 of the cleaning system 2 and their cooperation with the in-line carrier bus 11 common to at least two of these projection devices, such as FIG. they are shown schematically in this figure 3. In the following, it is expected that the projection devices all have the same shape to facilitate the standardization of the cleaning system, but we can obviously adjust if necessary the shape and size of a cleaning device without departing from the context of the invention, since in accordance with what has been described above, each projection device is electrically connected to the common bus independently of the other projection devices.

A projection device 100 to 111 comprises at least one electronic control module 120, a solenoid valve 7 and a nozzle 8. When the solenoid valve 7 is powered and actuated, that is to say when it has received a control instruction in this direction via the electronic control module 120, it allows the passage of the cleaning product flowing in the hydraulic distribution bus 3 to the nozzle 8. The cleaning product is then projected by the nozzle 8 on a glass surface 20, 21 of the system. optical detection 4 associated with the projection device 100 to 111. The position of the nozzle 8 beforeprojection of the cleaning product can be adjusted via displacement instructions generated by the electronic control module.

The projection device comprises a hydraulic connection member9 for its connection to the hydraulic distribution bus 3. The hydraulic coupling member 9 has a shape that can, on the one hand, pierce the hydraulic distribution bus 3 and, on the other hand, ensure passing the cleaning product from the distribution bus to the nozzle 8. For this purpose, the connecting member may have the tubular and tapered form of syringe. At the assembly of the hydraulic connection member 9 on the hydraulic distribution bus 3, a resin can be used to surround a contact zone between the hydraulic connection member 9 and the hydraulic distribution bus 3, in order to ensure a watertight seal. this contact area.

According to the invention, and as can be seen in FIG. 3, two projection devices 100 to 111 are successively arranged along the common hydraulic distribution bus 3 to be connected thereto via these hydraulic connection members 9 in zones successive distinct. Each projection device thus comes pricked on the common hydraulic distribution bus as and when deployment of this hydraulic distribution bus in the vehicle.

The projection device comprises a mechanical holding member 10 permitting the attachment on the hydraulic distribution bus 3. In the example illustrated, the mechanical holding member 10 takes the form of a gripper which surrounds at least partially the main hydraulic conduit participating in forming the hydraulic distribution bus 3 common to the plurality of projection devices 100 to 111. For example, it is possible to provide a resilient deformation holding member defining in its original position a groove of dimensions substantially smaller than that of the duct defining the distribution bus. , the operator then having to force the connecting member to sedéformer to be able to engage on the hydraulic distribution bus, and the elastic call of the connecting member ensuring the maintenance position on the bus. FIG. 3 shows two projection devices comprising these hydraulic connection members and these mechanical holding members operating with the hydraulic distribution bus 3.

According to the invention, and whatever the way in which the devices are hydraulically connected, on a common hydraulic distribution bus or not, and as is visible for the two projection devices shown in FIG. 3, each projection device is connected to the a power line bus 11 via an electrical connection member 14, independently of the electrical connection, on the same in-line feeder bus, of the neighboring projection device. The projection devices are electrically connected in connection areas which are distinct from one another and arranged remotely along the in-line carrier bus.

The in-line carrier bus 11 is electrically connected to a main electronic unit 200, configured in particular for coding the supply current that is circulated in the in-line carrier bus, in order to carry the supply current through this supply current. control for the projection device, and in particular operating instructions of the solenoid valve 7.

A projection device associated with an optical sensor-type optical detection system will be described below, it being understood that the characteristics relating to the hydraulic and electrical connection of the projection devices on a common bus may be reproduced for a projection device intended to clean a surface. glass such as the windshield or the rear window.

The projection device may be housed in a housing 12, as schematically illustrated in FIG. 3. The housing 12 furthermore comprises an optical detection system 4 which has a glazed surface that the associated projection device 100 to 111 must clean. Such an optical detection system 4 equipped with the vehicle 1 may be a video camera or a laser scanner necessary to enable the operation of a device for assisting the driving and / or maneuvering of the vehicle 1.

When a projection device 100 to 111 is associated with such an optical detection system 4, the latter is configured to communicate via an electrical connection cable 13, distinct from the in-line carrier current bus 11 of the projection devices 100 to 111, with a main electronic unit 200equipped with this vehicle 1. For example, when the optical detection system4 is a camera, this electrical connection cable 13 makes it possible to transmit a video signal to the main electronic unit 200.

As has been previously stated, and as illustrated in greater detail in FIGS. 3 and 4, the projection device comprises at least one solenoid valve 7, a nozzle 8, the electronic control module 120 for controlling the projection device and in particular the solenoid valve, and an electrical connection terminal 15 configured to allow the connection of the projection device, and in particular of the electronic control module and / or the solenoid valve, to the in-line carrier bus 11 at a connector embarked on the in-line power line bus 11, forming an electrical connection member 14. In this way, a connection is made to the splash device of the supply and communication network which is also continued to circulate in the vehicle to the next connector and the next associated projection device. The electrical connection member 14consists in a branch of the in-line power bus 11, bywhich two strands 140, 141 can be connected to a first pin 151 and a second pin 152 of the electrical connection terminal 15 of the solenoid valve 7. Each strand is thus derived from the in-line carrier bus, forming part of the power supply network 16 of the vehicle, for the electrical connection of the solenoid valve to a positive pole 160, for a voltage preferably equal to 12 V, and a pole no 161 for grounding.

The specificity of the in-line carrier current flowing in the common bus 11 to respectively power each of the projection devices allows transmitting to the electronic control modules associated with the solenoid valves in each projection device operating instructions superposition to the current passing a modulated frequency signal. As soon as one of the projection devices has to be implemented, following the detection of exceeding a threshold of dirt of the associated glazed surface, the main electronic unit 200 codes the current flowing in the bus 11 to propagate a frequency signal modulated along the bus, to the projection devices. Each projection device sees this modulated frequency signal and only the projection device for which this signal is intended takes it into consideration, the coding being specific to each projection device.

In other words, the electronic control unit of a solenoid valve 7 electrically strapped to the electrical connection terminal 15. This electronic control unit is programmed to continuously analyze the data transmitted by the in-line carrier bus 11. When this control electronic unit identifies an instruction issued by the main electronic unit 200, transmitted via the in-line carrier bus 11 and which is assigned thereto, for example a control command opening the solenoid valve 7, it actuates the solenoid valve 7 which It is associated with it and allows it to direct the cleaning product contained in the hydraulic distribution bus 3 to the nozzle 8 corresponding.

The projection device then recovers as much cleaning product as is necessary for the cleaning of the associated glazed surface, that is to say the amount of cleaning product passing through the solenoid valve during its operation by the electronic control unit. . FIG. 4 diagrammatically shows the hydraulic distribution bus 3 and the in-line carrier bus 11 forming a single electrical and hydraulic distribution bus 17, which, in accordance with what has been described above, is configured to serve a plurality of devices As shown, the in-line carrier bus 11 is formed in conjunction with the hydraulic distribution bus 3. In FIG. 5, there is shown a section of this electrical and hydraulic distribution bus 17, which is formed here. so that the hydraulic distribution bus 3 takes the form of an extruded tube inside which the cleaning product flows and which relates to sapériphérie at least one additional conduit to receive the in-line carrier bus 11, which is the kind arranged peripherally with respect to the hydraulic distribution bus 3. In this FIG. electrical connection 14 which makes it possible to gather the strands 140, 141 derived from the positive poles 160 and zero 161 of the in-line power bus 11, and subsequently to allow their connection to the electrical connection terminal 15 associated with the projection device.

In a variant not illustrated, it can be provided that the in-line carrier bus flows in the center of the tube forming the hydraulic distribution bus. In particular, the tube may be annular to receive at its center the power line bus in line. In this configuration, as in the one above, the in-line carrier bus can act as a resistive wire to heat-up the temperature of the cleaning product to be produced, especially in very cold conditions.

When a projection device 100 to 111 is hydraulically connected to the hydraulic distribution bus 3, the hydraulic connection member 9 is advantageously disposed on the electrical and hydraulic distribution bus 17 so as not to damage the in-line carrier bus 11.

It will be understood from the foregoing that the cleaning system according to the invention is advantageous in that it comprises at least two cleaning devices arranged at a distance from one another in the vehicle and powered at least electrically by a power distribution bus, of the in line power bus type, common to these cleaning devices. The distribution bus is arranged through the vehicle to bring close to the cleaning devices the electricity necessary for the operation of the solenoid valves specific to each of these cleaning devices as well as the activation commands of these solenoid valves, and it is noteworthy according to the invention that these cleaning devices are drawn from the current and the information flowing in the common bus for their operation, regardless of the cleaning devices around.

Of course, the features, embodiments of the invention can be associated with each other, in various combinations, insofar as they are not incompatible or exclusive of each other. In particular, it will be possible to imagine variants of the invention comprising only a selection of characteristics subsequently described in isolation from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention from the state of the technique.

Claims (2)

A cleaning system (2) of at least one glazed surface (20, 21) for vehicles (1), comprising at least two projection devices (100 to 111) of a cleaning product on an associated glazed surface, characterized the projection devices each comprise an electronic control unit (120) configured to control the operation of the corresponding projection device according to control instructions, and in that the cleaning system comprises an in-line carrier decurrent bus common to the at least two devices projectors (100-111), which are electrically connected to the in-line feeder bus (11) independently of each other and in low-pass areas (90, 92) of said in-line power bus. 2. Cleaning system (2) according to the preceding claim, characterized in that at least one of the projection devices (100 to 111) iselectrically connected to the in-line carrier bus (11) via a connecting member electrical connector (14) arranged on said bus. Cleaning system (2) according to the preceding claim, characterized in that each of the projection devices comprises an electrical connection terminal (15) configured to be connected on the one hand to one of the electrical connection elements (14) arranged on the bus in-line carrier (11) and on the other hand to the electronic control module. 4. Cleaning system (2) according to the preceding claim, characterized in that the electrical connection terminal (15) has two pins (150,151) of power supply. Cleaning system (2) according to the preceding claim, characterized in that it comprises pairs of electrical wires (140, 141) in which each wire connects respectively a pin (150, 151) of one of the connection terminals and the one of the electrical connection members (14). Cleaning system (2) according to one of the preceding claims, characterized in that the electronic control module (120) is configured to analyze all of the control instructions through the in-line carrier bus (11) and in order to recover in this set the command instruction or instructions corresponding to the projection device. 7. Cleaning system (2) according to the preceding claim, characterized in that each of the projection devices (100 to 111) comprises an electrovalve (7) and a nozzle (8), said solenoid valve being controlled by the electronic control module (120) . 8. Cleaning system (2) according to any one of the preceding claims, characterized in that at least one of the projection devices (100 to 111) is associated with an optical detection system (4), the projection device and the associated optical detection system being housed in a common housing (12). 9. Cleaning system (2) according to any one of the preceding claims, characterized in that it comprises a hydraulicdistribution bus (3) capable of allowing the circulation of the cleaning product, the at least two projection devices (100-111). being hydraulically connected to the hydraulic distribution bus (3) independently of one another. Cleaning system (2) according to the preceding claim, characterized in that at least one of the projection devices (100 to 111) comprises hydraulic connecting members (9) on the hydraulic distribution bus (3). Cleaning system (2) according to claim 9 or 10, characterized in that at least one of the projection devices (100 to 111) comprises mechanical holding members (10) on the hydraulic distribution bus (3). Cleaning system (2) according to one of Claims 9 to 11, characterized in that the in-line carrier bus (11) and the hydraulic distribution bus (3) form a single distribution bus (17). electric and hydraulic projection devices (100-111). 13. Cleaning system (2) according to the preceding claim, characterized in that the distribution bus (17) electrical and hydraulic comprises an extruded tube having in the center of the tube a central channel inside which is likely to circulate the cleaning product and having on the periphery of the pipe of the ducts inside which are likely to circulate each of the supply strands of the in-line carrier bus. 14. Cleaning system (2) according to claim 12, characterized in that the electric and hydraulic distribution bus (17) comprises a tube inside which is likely to circulate the cleaning product and inside which also extends the bus in-line carrier current (11). 15. Cleaning system (2) according to any one of claims 12 to 14, characterized in that the electric and hydraulic distribution bus (17) comprises at least two portions (32, 33) connected to one another by a hydraulic and electrical connector (6).